If Target doesn't match their ad, then there is something wrong with your Target. It's their ad, and they will match THEIR OWN prices within 14 days of your purchase. You don't even have to take the merchandise with you, just your receipt.
If you are skeptical, then take the merchandise to the store with you. If they give you grief about matching the price, then return EVERY item on sale and then ask to repurchase the items.
As long as they weren't either already on sale or on clearance, it is the company policy to honor the sales price on prior purchases .. made within 14 days of purchase.